ES2535255T3 - Device and procedure for fixing parts - Google Patents

Abstract

Device for fixing parts, characterized in that it comprises: - a magnetic generating element (1), configured to generate magnetic flux (2), which has an upper face (3), - a container (4) formed by substantially vertical walls, without bottom or lid, perfectly attached to the upper surface (3) of the magnetic generating element (1), - a magnetorheological fluid (5) that has a high yield point located on the upper surface (3) of the magnetic generating element (1 ) and contained by the container (4) forming a bubble-free layer, - in which the magnetic generator element (1) has the ability to generate a magnetic flux (2) in the magnetorheological fluid (5) greater than 100 mT.

Description

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DESCRIPTION

Device and procedure for fixing parts

Technical Field of the Invention

The present invention relates to a device for fixing parts (non-magnetic parts), which has an application in the parts machining industry and, more specifically, in the area of machining of different parts with a complex geometry and large dimensions .

Background of the invention

Given the demands and demands in modern industry today, the time taken, as well as the associated cost in carrying out the clamping, fixing or immobilization of parts in the machining equipment, is a determining factor in the manufacture of parts, especially to achieve flexible production, in which more and more flexible manufacturing is required that involves a very fast production of a wide variety of parts in small production batches.

This factor is even more important when dealing with parts that are difficult to handle, position and hold in the machining equipment, due to the fact that they have geometries with complex curves, non-rigid surfaces or are simply structures that are weak against machining. or do not have reference faces.

There are currently several devices that allow to fix or grab parts by means of the use of fluids generally called magnetorheological fluids. Rheology is a field of physics that involves the relationship between stress and strain in materials that have the ability to flow.

The magnetorheological fluids are suspensions of tiny iron particles evenly distributed in a liquid medium, generally mineral oil or silicone that, in a liquid state, have the consistency of a viscous oil. When a magnetic field is applied, the iron particles are distributed in fractions of a second according to the lines of said field and, in this way, the mechanical behavior of the fluid is modified. As the intensity of the magnetic field increases, these fluids transform into a solid gel-like mass.

Given their characteristics, for applications in the fixation of pieces, the magnetoreological fluids adapt to the small geometric variations or fluctuations that the pieces may present, so that they can be used to apply uniform fixing forces, even in parts that have surfaces large, to compensate for dimensional inaccuracies or changes in the way the pieces may present. Moreover, magnetorheological fluids absorb the vibrations that, for example, occur while machining operations are carried out, such as milling, without such vibrations being transmitted to the part, which allows very small parts to be processed with great precision, by whose reason the use of these fluids for fixing parts during machining is extended in the field of watchmaking parts.

German patent application number DE-10209783-A1 describes a procedure and a device for supporting, positioning and gripping small parts, for example, in the field of the watchmaking, medical or microelectronic technology industry, by employing a rheological fluid as a support medium. For this, a part of the piece is introduced into the fluid that is housed in a container, such that a distance of less than 5 mm is maintained between the piece and the walls of the container. Given the small size of the pieces, it is possible to create a magnetic field that passes through the fluid and the container from one side to the other. However, the main disadvantage of this device is that in case the distance between the ends of the container is greater than 50 mm, the value of the magnetic flux is very weak and, therefore, the fixing force is not large enough to keep it immobilized, so that said device and procedure do not work with parts that have a size of more than 50 mm.

On the other hand, German patent application number DE-10352037-A1 and international application number WO-2006/074650-A1 describe fixing devices for irregular parts comprising an elastic shock absorber that hermetically contains a magnetorheological fluid, in which said Elastic shock absorber projects from the tool frame. The disadvantage of these devices is that they are not able to withstand large shear stresses without the piece moving during machining processing. Nor do the devices include means for correct positioning and orientation of the piece in a specific fixing position, the elastic shock absorber surface itself, which adapts to the shape of the piece, which determines the final orientation and position of the part. piece in an uncontrolled manner.

British patent application number GB-2317157-A describes a gripping device by means of an electro-rheological fluid, in which the ER fluid is not in direct contact with the part to be supported or with the element that generates the field magnetic, which comprises a jaw, whose function is to dislodge an object from one position to another, in which the piece is not subjected to large machining efforts.

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U.S. Patents UU. Nos. US-6267364-B1, US-6647611-B2 and US-6182954-B1 describe devices for supporting parts by means of magnetorheological fluids, which consist of very complex devices in which the parts are positioned inside a container that houses the fluid magnetorheological by means of positioning screws that are designed to exert a minimum force on the piece, in order to keep it in the position and orientation required during machining without damaging it. The disadvantage of these devices is that they do not allow machining large complex parts that are subjected to large forces during machining, since they do not have the ability to keep said parts in their fixation position during machining. In these patents, as well as in the German patent DE 10209783-A1, the magnetic field passes through the fluid and the container from one side to the other. This configuration only allows the fixing of small parts with high retention forces or medium sized parts with small forces.

Finally, German patent DE 10244867-A1 describes a device for fixing and positioning parts using magnetorheological fluids. The device comprises a container for the MR fluid and the part is partially introduced into the MR fluid without direct contact with the container. In the patent there is no indication of the magnetic field necessary to hold a large part subjected to great effort during machining operations.

Some other devices in the prior art, in a manner similar to that discussed above, are disclosed in US Patent No. US-2770823-A, German Patent Applications No. DE-2357672-A1 and DE-19654864-A1, and the Soviet Union patent application No. SU-1007901-A1.

Therefore, and especially in fields that are subject to very high costs, such as the aeronautical and aerospace industries, for example, there is a huge need to have adequate, safe and fast fastening means that allow to fix parts with complex geometries firmly. and large dimensions during its machining, whatever its geometry and mechanical characteristics may be, also allowing its rapid and unequivocal positioning and orientation in a particular fixing position.

Description of the invention

A first aspect of the present invention relates to a device for fixing parts, which allows immobilizing, holding and maintaining parts with a complex geometry and large dimensions firmly fixed in place, without the need for said parts to have reference faces, keeping them immobilized by means of the use of a magnetorheological fluid while carrying out strong machining operations on them, in whose operations the piece is subjected to great efforts.

The device of the invention has a particular application in the machining, specifically in milling, of structural elements such as "T" shaped titanium stringers, in which high precision and firm fixation are required, while at the same time requires special care not to damage the part as a result of such fixation.

The device for fixing parts proposed by the invention comprises a magnetic generating element, which may consist of an electromagnet or magnetic plate, configured to generate magnetic flux, in which said magnetic generating element has an upper face.

The device also comprises a container that does not have a lid or bottom and is only formed by substantially vertical walls. Said container is perfectly secured on the upper surface of the magnetic generating element.

The device comprises a magnetorheological fluid that has a high creep point located directly above the upper surface of the magnetic generating element. The magnetorheological fluid is contained laterally by the container forming a layer intended to be a bubble free layer. In turn, the magnetic generator element has the ability to generate a magnetic flux in the magnetorheological fluid greater than 100 mT, which causes the immobilization or fixation of a localized part partially submerged in said magnetorheological fluid, while operations are carried out of machining on the upper part not submerged of the piece. In accordance with the invention, and unlike devices of the prior art, the device can fix parts that are several meters long, withstanding forces greater than 1000 N.

The magnetorheological fluid is, in this way, in direct contact with the piece to be fixed, without air pockets in said fluid, which would reduce the holding capacity of the device, as well as the uniformity of the magnetic flux that acts on said fluid, and, therefore, on the piece.

The magnetorheological fluid increases its mechanical resistance in fractions of a second under the action of a magnetic field, fixing the piece safely, but without damaging it.

The fact that the fluid is in direct contact with the magnetic generating element makes it possible to achieve high magnetic fluxes in the fluid that are sufficient to resist shear stresses, which is not possible when the fluid is housed in a bottomed container, as in most devices of the prior art.

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In the case of the invention, the fluid is in direct contact with the magnetic plate, so that there is a very short distance, preferably less than 5 mm, between the magnets of the magnetic generating element and the magnetoreological fluid, although the possibility that there is a coating layer of the magnets between the magnetoreological fluid and the magnets, although the distance between the magnets and the magnetoreological fluid must be, in any case, less than 2 mm.

Therefore, by means of the device of the invention it is achieved that the magnetic field is closed through the magnetorheological fluid. If the container has a bottom, a separation would be introduced between said container and the magnetic generating element, which would reduce the magnetic field. In the case of the invention, the separations, such as airbags, do not take place at any point between the part and the fluid, or between the fluid and the magnetic generating element.

The device of the invention, in this way, can fix very long pieces, several meters long, which have very low rigidity, without damaging them, whose pieces do not have reference faces, parts made of non-magnetic materials such as aluminum and parts made of materials to which large forces cannot be applied because they would cause permanent deformations in the material as a result of the fixation, as in the case of titanium due to the memory effect of this material.

When a part is fixed by immersion in the magnetorheological fluid, the main stresses that take place are shear stresses, as well as compression and tensile loads. In order to securely fix and hold parts with large dimensions, the magnetorheological fluid must have a high resistance and, in particular, a high creep point, which determines the force that must be applied to produce the material's creep.

In the case of the invention, since the magnetorheological fluid has a high creep point, only a small area or part of the piece must be submerged in the fluid, thereby increasing the area available for machining. Depending on the geometry of the piece and the degree of immersion, tensile and compressive stresses of different values act on the magnetoreological fluid, in addition to the shear stresses, so that it is necessary to present a high density of the magnetic flux in the area located below the part, that is, in the area of the fluid located below the part.

The magnetic generator element preferably consists of at least one electromagnet in which the magnetic field is electrically activated, which allows generating magnetic fields with high values, which, at the same time, are compact elements to be integrated into the device, which can also be manufacture in large dimensions. Moreover, electromagnets are easy to use, and the magnetic field can be activated and deactivated simply by pressing a switch.

However, it is also contemplated that the magnetic generating element consists of a mechanically activated magnet capable of generating a high density of the magnetic flux.

The possibility that the device is configured to position and fix a part, which is partially submerged in the magnetoreological fluid, in which said part has a lower surface with a configuration that matches the upper surface of the magnetic generator element, in which the distance between said lower surface of the piece and the upper surface of the magnetic generating element is less than about 5 mm, that is, it is contemplated that the thickness of the magnetoreological fluid layer is less than 5 mm. In that case, if the lower surface of the piece to be fixed is flat, the upper surface of the magnetic generating element is flat, while if the lower surface of the piece to be fixed is cylindrical, the upper surface of the Magnetic generator element is cylindrical.

In order to achieve the maximum magnetic flux in the magnetorheological fluid, said fluid is in direct contact with the magnetic generating element and the thickness of the magnetorheological fluid layer is as small as possible, less than 5 mm, such that the Device geometry, that is, the upper surface of the magnetic generator element, is very similar to the geometry of the part to be fixed.

This makes the magnetic field greater because, if there is a lot of fluid, the magnetic field does not penetrate completely and the forces achieved are lower.

The possibility is also contemplated that the container is made of magnetic material in order to maximize the force generated in the magnetorheological fluid. Therefore, the flow lines are closed through the container, increasing the magnetic flux on the sides of the piece, since the circulation of the magnetic flux through the container is allowed, thereby achieving magnetic sealing on the surface of the magnetorheological fluid.

According to a preferred embodiment, the container has a geometry in plan view similar to the geometry in plan view of the piece to be fixed, the geometry being greater in plan view of the container, preferably in no more than 10 mm, that the geometry in plan view of the piece to be fixed.

The possibility that the device comprises at least one mobile reference element or pin configured to adapt the geometry in plan view of the container to the geometry in plan view of the part is contemplated.

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which is to be fixed, allowing the piece to be placed in a desired position and orientation to carry out the machining operations.

In this way, it is achieved that the container is able to adapt to different profiles, with different lengths and cross sections. For this, it is also contemplated that the container may comprise several parts or parts that can be mounted in different positions. The device can also comprise several pieces or parts mounted in one and the same position, in addition to the elements or plates of the container, which allows said container to be adapted to the length of the piece to be fixed.

From a magnetic point of view, the height of the mobile reference elements is as small as possible. The part can be supported by mobile reference elements that are arranged directly on the upper surface of the magnetic generating element. In that case, the height of the movable reference elements is the same as the width of the magnetorheological fluid layer, that is, the distance between the part and the magnetic generating element.

In addition to the mobile reference elements, the part can be positioned by means of reference devices that can consist of two parts located in lateral opposition, one being a pin with which it is assembled and the other a mobile or propellant positioning element, whose position can be adjusted against the piece, both being able to be strung to the magnetic generator element.

In this way, it is achieved that the device has a flexible configuration that allows a rapid change for the manufacture of a plurality of lengths and sections of piece in which the assembly and disassembly of the pins is easily carried out.

The possibility is also contemplated that the magnetic generating element has the ability to generate a plurality of independent magnetic fluxes very close to each other in the magneto-rheological fluid, such that said magnetic fluxes are conducted through the magneto-rheological fluid and close in the magnetic generator element.

In case the width of the piece is too large, greater than 50 mm, to be able to generate a continuous magnetic field that crosses said width, a plurality of independent magnetic fluxes are created that are very close to each other by means of the device of the invention, whose field lines leave the magnetic generating element, pass through the magnetoreological fluid and enter or terminate in the magnetic generating element itself.

The possibility is contemplated that the magnetic generating element comprises a fixed plate of non-magnetic material with a thickness not exceeding 2 mm, and a mobile plate of non-magnetic material having a plurality of permanent magnets inserted therein in which the face The upper part of the fixed plate is in contact with the magnetorheological fluid and the mobile plate is located on at least one hydraulic cylinder capable of moving said mobile plate.

Also, depending on the type and value of the forces to be resisted while the part is machining, it may be necessary to use a magnetic flux regulator device, also called a pole adapter, in order to increase the magnetic flux density in a area located under the fixed part. The magnetic flux regulating device allows changing the direction of the poles by 90 °, reducing the distance between the poles of the magnetic field by more than 50% for a pair of poles, in addition to providing a kind of magnetic sealing on the sides of the piece (6).

The smallest distance between poles in commercial magnetic plates is too large (ie 50 mm for a pair of poles) and said distance cannot be reduced because it is required to contain the windings necessary to activate and deactivate the magnetic generator plate or element.

A second aspect of the invention relates to a method for fixing parts comprising using a device, such as the one described above. The procedure includes:

- disposing a layer of magnetorheological fluid that has a high yield point directly on the upper surface of the magnetic generating element inside the container,

-position the partially submerged part to be fixed in direct contact with the magnetorheological fluid, in order to avoid bubbles remaining between the piece to be fixed and the magnetorheological fluid, so that the distance between the lower surface of the part and the upper surface of the magnetic generator element is less than about 5 mm, and

-generate a magnetic flux in the magnetorheological fluid with a value greater than 100 mT.

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Description of the drawings

To complete the description that is being made and in order to help to better understand the characteristics of the invention according to a preferred practical embodiment thereof, a set of drawings is attached as an integral part of said description, in which what has been described following with an illustrative and non-limiting nature:

Figure 1 shows a schematic view, according to a cross section, of the device of the invention, in which the magnetic field flow lines have been represented by means of arrows.

Figure 2 shows a schematic view like that of Figure 1, in which two mobile reference elements located inside the part have been represented, as well as two mobile positioning elements located laterally with respect to the part.

Figure 3 shows a schematic view like that of Figures 1 and 2, in which a plurality of mobile reference elements and a single mobile positioning element located laterally have been represented.

Figure 4 shows a partial schematic perspective view of the device of the invention, in which a piece with intermediate dimensions is shown in a fixing position.

Figure 5 shows a partial schematic view like that of Figure 4, in which a part has been shown in a fixing position, the length of which is virtually the maximum part length that the device can fix.

Figure 6 shows a general schematic perspective view of the device of the invention.

Figure 7 shows an exploded schematic view of an embodiment of the magnetic generator element comprising a fixed aluminum plate and a mobile plate of non-magnetic material which has a plurality of permanent magnets inserted therein and is displaced by a plurality of cylinders Hydraulic

Figure 8 shows a schematic view, in accordance with a cross section at the height corresponding to a hydraulic cylinder, of the device of the invention with the magnetic generating element of the embodiment represented in Figure 7, in which a part is shown in the fixation position.

Figure 9 shows a detail of Figure 8.

Figure 10 shows a partial schematic view of an embodiment variant of the device comprising a magnetic flux regulator device (pole adapter).

Figure 11 shows a schematic cross section of a conventional magnetic plate in a demagnetized state.

Figure 12 shows a schematic cross section of a conventional magnetic plate in a magnetized state.

Preferred Embodiment of the Invention

In view of the aforementioned figures, it can be seen that in one of the possible embodiments of the invention, the device for fixing parts proposed by the invention comprises a magnetic generating element (1) configured to generate magnetic flux (2), in that said magnetic generating element (1) has an upper face (3).

The device comprises a container (4), whose surface in plan view has a length of the order of several meters, of a magnetic material that is only formed by vertical walls and is perfectly secured on the upper surface (3) of the magnetic generating element (one).

The device comprises a magnetorheological fluid (5) that has a high creep point located directly on the upper surface (3) of the magnetic generating element (1) and is laterally contained by the container (4) forming a bubble free layer.

It is understood that the magnetorheological fluid (5) has a high creep point to the extent that said magnetorheological fluid (5) is capable of withstanding stresses under compression loads of an order of 200 kPa and under tensile loads of an order of 70 kPa under a magnetic flux (2) of 400 mT.

The magnetic generator element (1) has the ability to generate a magnetic flux (2) in the magnetoreological fluid (5) greater than 100 mT, which causes the immobilization or fixation of a part (6) consisting of an aeronautical stringer of "T" shaped titanium located in a manner partially submerged in said magnetorheological fluid (5), while milling operations are carried out on the non-submerged part of said part (6).

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The magnetorheological fluid (5) is in direct contact with the magnetic generating element (1), such that the depth of the magnetoreological fluid (5) is less than 5 mm between the magnetic generating element (1) and the part (6) .

According to a preferred embodiment, the magnetic generating element (1) consists of an electromagnet in which the magnetic field is electrically activated, which allows generating magnetic fields with high values.

Therefore, the device is configured to position and fix a part (6), which is partially submerged in the magnetorheological fluid (5), in which said part (6) has a lower surface (7) with a configuration that coincides with the upper surface (3) of the magnetic generating element (1), in which the distance between said lower surface (7) of the part (6) and the upper surface (3) of the magnetic generating element (1) is less than about 5 mm

Also, according to a preferred embodiment, the container (4) has a geometry in plan view similar to the geometry in plan view of the part (6) to be fixed, the geometry being in plan view of the container (4) greater than 10 mm greater than the geometry in plan view of the part (6) to be fixed.

The device comprises a plurality of mobile reference elements (8) configured to regulate the distance between said lower surface (7) of the part (6) and said upper surface (3) of the magnetic generating element (1).

As can be seen schematically in Figure 1, the magnetic generator element (1) has the ability to generate a plurality of independent magnetic fluxes (2) very close to the magnetorheological fluid (5), such that said magnetic fluxes ( 2) are conducted through the magnetorheological fluid (5) and close in the magnetic generator element (1).

If the width of the part (6) is too large, greater than 50 mm, to be able to generate a continuous magnetic field that crosses said width, a plurality of magnetic fluxes are created by means of the device of the invention ( 2) that are independent, but very close to each other, whose field lines leave the magnetic generator element (1), cross the magnetoreological fluid (5) and enter or terminate in the magnetic generator element itself (1).

Also, as can be seen in Figure 3, the device comprises a mobile positioning element (9) for the positioning and orientation of the part (6) to be fixed in a predetermined position in the device, allowing the placement of the part (6) in a desired position and fixing orientation to carry out the machining operations.

On the other hand, according to the variant embodiment shown in Figures 7 to 9, the magnetic generating element (1) comprises a fixed plate (10) of non-magnetic material, aluminum in the present embodiment, with a thickness not greater than 2 mm, and a movable plate (11) of non-magnetic material having a plurality of permanent magnets (12) inserted therein in which the upper face of the fixed plate (10) is in contact with the magnetorheological fluid (5) and the mobile plate (11) is located on at least one hydraulic cylinder (13), preferably a plurality, capable of moving said mobile plate (11). In this case, the magnetic field in the magnetorheological fluid can be regulated by changing the distance between the movable plate (11) and the fixed plate (10) by means of the hydraulic cylinder (13).

Also, as shown in the variant shown in Figure 10, the device comprises a magnetic flux regulator device (14), in order to increase the magnetic flux density in an area located under the fixed part (6). The magnetic flux regulator device (14) allows to change the direction of the poles according to 90 °, reducing the distance between the poles of the magnetic field by more than 50% for a pair of poles, in addition to providing a kind of magnetic sealing in the sides of the piece (6). For example, by using a magnetic plate 1414 mm long and 135 mm wide, the distance between the poles can be reduced to approximately 12 mm.

Therefore, according to said embodiment, the magnetic generator element (1) comprises the magnetic flux regulator device (14), whose function is to concentrate the magnetic flux (2) in the area located under the part (6) that is going to fix. The magnetic flux regulator device (14) changes the direction of the magnetic flux (2) according to 90 ° and allows the distance between poles to be reduced by more than 50%. The magnetic flux regulator device (14) has the ability to transmit and increase the plurality of independent magnetic fluxes (2) generated by the magnetic generator element (1), leading them through the magnetoreological fluid (5) and closing them in the generator element magnetic (1).

Figures 11 and 12 show a conventional magnetic plate (1) comprising a magnetic generating element, which may consist of neodymium magnets (2, 2 ") and reversible alnico magnets (2 '), configured to generate magnetic flux, in that said magnetic plate (1) has an upper face (3).

If an electric current is applied to the reversible alnico magnets (2 ’), the polarity of the magnetic generating element (1) changes and the magnetic field emerges through the upper surface (3) of the magnetic plate (1),

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as can be seen in figure 12, while, when no current is applied the magnetic field, it is confined inside the magnetic plate (1).

Claims (13)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. Device for fixing parts, characterized in that it comprises: -a magnetic generator element (1), configured to generate magnetic flux (2), which has an upper face (3), -a vessel (4) formed by substantially vertical walls, without bottom or lid, perfectly secured on the upper surface (3) of the magnetic generating element (1), -a magnetorheological fluid (5) having a high creep point located on the upper surface (3) of the magnetic generating element (1) and contained by the container (4) forming a bubble-free layer, -in which the magnetic generator element (1) has the ability to generate a magnetic flux (2) in the magnetoreological fluid (5) greater than 100 mT.

2.

Device for fixing parts according to claim 1, wherein the device is configured to position and fix a part (6) that is partially submerged in the magnetoreological fluid (5), wherein said part (6) has a lower surface (7) with a configuration that coincides with the upper surface (3) of the magnetic generating element (1), the distance between said lower surface (7) of the part (6) and said upper surface (3) of the magnetic generator element (1) less than about 5 mm.

3.

Device for fixing parts according to claim 2, wherein the container (4) is made of magnetic material.

Four.

Device for fixing parts according to any of the preceding claims, wherein the container (4) has a geometry in plan view similar to the geometry in plan view of the piece (6) to be fixed, the geometry being in plan view of the container (4) larger than the geometry in plan view of the piece (6) to be fixed.

5.

Device for fixing parts according to claim 4, wherein the geometry in plan view of the container (4) exceeds the plan view geometry of the part (6) to be fixed by no more than 10 mm.

6.

Device for fixing parts according to any of claims 4 and 5, comprising at least one mobile reference element (8) configured to regulate the distance between said lower surface (7) of the part (6) and said upper surface (3) of the magnetic generating element (1).

7.

Device for fixing parts according to any of the preceding claims, wherein the magnetic generator element (1) has the ability to generate a plurality of independent magnetic fluxes (2) very close to each other in the magnetoreological fluid (5) , such that said magnetic fluxes (2) are conducted through the magnetorheological fluid (5) and are closed in the magnetic generating element (1).

8.

Device for fixing parts according to any of the preceding claims, comprising at least one mobile positioning element (9) for positioning and orientation of the part (6) to be fixed in a predetermined position in the device.

9.

Device for fixing parts according to any of the preceding claims, wherein the magnetic generating element (1) comprises a fixed plate (10) of non-magnetic material, with a thickness not exceeding 2 mm, and a movable plate (11) of non-magnetic material having a plurality of permanent magnets (12) inserted therein, in which the upper face of the fixed plate (10) is in contact with the magnetoreological fluid (5) and the mobile plate ( 11) is located on at least one hydraulic cylinder (13) capable of moving said movable plate (11).

10.

Device for fixing parts according to any of the preceding claims, wherein the magnetic generating element (1) comprises a magnetic flux regulating device (14) capable of concentrating the magnetic flux (2) in an area located under the piece (6) to be fixed, the magnetic flux regulator device (14) being able to change the direction of the magnetic flux (2) by 90 ° and allowing a reduction in more than 50% of the distance between poles, in which said magnetic flux regulator device (14) has the ability to transmit and increase a plurality of independent magnetic fluxes (2) generated by the magnetic generating element (1), leading them through the magnetoreological fluid (5) and closing them in the element magnetic generator (1).

eleven.

Device for fixing parts according to any of the preceding claims, wherein the magnetorheological fluid (5) has a high creep point, such that said magnetorheological fluid is able to withstand stresses under compressive loads of an order of 200 kPa and under tensile loads of an order of 70 kPa under a magnetic flux (2) of 400 mT.

9

12.

Device for fixing parts according to any of the preceding claims, wherein the surface in plan view of the container (4) has a length of the order of meters.

13.

Method for fixing parts, characterized in that it comprises using a device according to any of the preceding claims, comprising:

5 -dispose a layer of magnetorheological fluid (5) that has a high creep point directly on the upper surface (3) of the magnetic generating element (1) inside the container (4), -position the partially submerged part (6) to be fixed in direct contact with the magnetorheological fluid (5), avoiding bubbles remaining between the part (6) to be fixed and the magnetorheological fluid (5), so that the distance between the lower surface (7) of the part (6) and the upper surface (3) of the magnetic generator element (1) 10 is less than about 5 mm, and -generate a magnetic flux (2) in the magnetorheological fluid (5) with a value greater than 100 mT. 10